SRAM Riken Quarq Powermeter Road Crankset with BB30 Bottom Bracket, 172.5mm/53/39T Carbon fiber crank arms with CNC machined aluminum spider Carbon fiber crank arms with CNC machined aluminum spider Carbon fiber crank arms with CNC machined aluminum spider SRAM TSM rings (same as SRAM Red - Black edition) gives compatibility to all SRAM 10 speed front derailleurs 823g (GXP, 130BCD, 172.5mm)